(Note: the 891 has dual serial ports, it does not have an USB soundcard).

2) Reboot the PC and check that you see two serial devices in your Device manager (type device manager when clicking the start button)

3) Hold F on the FT-891 in a couple of seconds (long click)

4) Goto menu 05-06
Set CAT RATE to 38400

6) Goto menu 05-08.
Set CAT RTS to DISABLE (unless you do that you may have a problem getting data thru)

7) Set the rate to 38400 in TRX-manager (setup menu) and select FT-891. Also select correct COM port (on my PC it was COM5. It may be different on yours).
Remember: unless you set CAT RTS to DISABLE (see above) you will not get data thru and you will mess around in the TRX-manager menus while the problem was a setting in the FT-891 menu.

8) Stop and restart TRX-manager

9) You may hear a clicking sound for every CAT transmission in your FT-891 loudspeaker (A bit annoying… I have to admit that even if I like Yaesu radios)

10) Click F on the FT-891 (short click)

11) Goto MON on the FT-891 menu

12) Click on MON

13) Turn down the MON level to 0
Note: This applies regardless if you have MON ON or MON OFF (this is a bug in Yaesu’s firmware. Rare. LOL)

14) Now you have CAT control without any clicking sounds on your FT-891

15) Enjoy your Yaesu FT-891

Comments about the FT-891:

Plusses: the FT-891 has in my view a better and more modern RX than the ageing FT-857, even better than IC7300 (some ppl. claim) http://www.eham.net/reviews/detail/13042?page=2 , it is a low cost modern mobile 100W HF rig with a small detachable front, it has DSP RX, a nice variable RX filter, works well down to low voltages even if someone claims it doesn’t, has a much better menu system and a better VFO, it has a reasonable current draw on RX (even if the datasheet overstates this a bit it is below 1A on my rig).

Minuses: No VHF or UHF ( however that may be a benefit. Not the compromises that probably are in the 857 rf chain). No USB soundcard (do you really need that in a mobile station?), 60M USB has to be programmed in a memory and you go memory tune from there and it will keep USB even if you are below 10 MHZ.

The Arduino platform has gained a fantastic popularity over the past ten years. For small quick and dirty projects, the .ino files and the standard IDE is OK. However, for professional development projects and for developers that want control over the .hpp and .cpp files the standard Arduino IDE is somewhat regarded like a toy. Furthermore there is no proper debugger in the Arduino IDE (whaaat?, you gotta be kidding?)

Well, this has changed as Visual Micro has developed a plugin to Microsoft Visual Studio. You can write code the normal way you do it with .cpp and .hpp files. You can also run the GDB debugger. The IDE has support for the regular .INO files and Arduino libraries. Here is how both .cpp and .ino files are handled: http://www.visualmicro.com/page/User-Guide.aspx?doc=INOs-and-CPPs.html

There is a free version of Visual Micro and it works against the free versions of Microsoft Visual Studio 2017 Community Edition. All you need is a Microsoft account to be able to download and install Visual Studio 2017 Community edition. Then in MSVC 2017, go to tools, Extensions and Updates and enter a search for Arduino in the search bar. It will will offer to automatically install the Arduino tools and the GDB debugger. Click install and you are on the right path.

Sometimes it is good to know what DMR repeaters are available in a certain country. The Brandmeister repeater listing at https://brandmeister.network/?page=repeaters doesn’t seem to have this per country overview easily available (disclaimer -> I may be wrong 🙂 ).
I have found that by knowing your country master code you can search for that in the repeater page of Brandmeister and all repeaters registered in your country will be shown. For example the country code for norway is 241 and the master code is 2421 so if I enter 2421 I will get all the repeaters in Norway.

The Smith chart is a tool used a lot by professional RF engineers for solving transmission line stub matching problems and all sorts of quick calculations.

The Smith chart can also be used for quick back of the envelope L and T antenna tuner engineering calculations.

I have on the picture above plotted a T configuration antenna tuner with the first capacitor set to a so big value that it is shorted as seen by the RF voltage (large C – low |Z|). Then the configuration becomes a L tuner in practice with a shunt L followed by a series C when seen from the load in towards the generator.

I measured the Z in the shack end of the ladder line feeding my doublet antenna to be Z = (24.1 – j35) ohms at 14.200 MHz by a Vector Network analyzer. That can be plotted as a point in the lower part of the Smith chart (capacitive Z).

(1) Since we have now first an inductor (in the tuner to ground) as observed from the load towards the generator, we can use this inductance to move along a constant Conductance curve in the Y plane (upwards in the Z plane). The conductance is constant but the Susceptance varies. (We remember from the RF engineering classes at engineering school that Y = 1/Z – of course).

(2) Then we use a series capacitor to move down inside the 1.25:1 SWR circle. We dont have to hit the center because anything inside the inner 1.25:1 circle is good enough. (We move while the R part of R + jX is constant, while the X part is changing to become more negative. This means we move on a constant resistance circle in the Z plane).

Determination of component values can be done easily by hand in a tool like this while still retaining an intuitive understanding of what is going on.

K6JCA has analyzed the needed components values for matching a load while moving on a constant reflection coefficient circle. The plot below shows that in case you select the high-pass configuration for your tuner, certain angles of the reflection coefficient will give you skyrocketing component values.

I have made a repeaterlist for the Oslo area in Norway. This list can be saved as CSV from Excel and is then after saving as CSV compatible with Chirp.

Make sure to check that the CSV files uses commas (,) as separators and NOT semicolon (;). This can be set in the meny you see below. Goto Start menu and type locale. Click the change date, time, number format.

Thanks to Alf LA2NTA for the data I used in this list. See another posting for the direct link to Alf’s list that is located in the cloud. My list here will not be frequently updated, but per April 2017 it should give a good starting point.

Program a couple of memory channels in your radio (in my case Icom Ic-2725) from the RADIO menus

Connect chirp to the radio

DOWNLOAD the data from the radio

Export from Chirp to a CSV file

Study this CSV file and use it as a template

Copy paste frequency and ctcss and offset info ++ from ANOTHER XLS file to the CSV file you made above!

Save as CSV from Excel (this is now your frequency list to import to the radio)

Check with Notepad ++ that there is COMMA (not semicolon) separation saved when you save as CSV from Excel. If this is not the case, go to regional settings / additional and set list separator as , (as opposed to ;). Start and stop Exel and a reboot wont hurt to make the settings take effect

Now you import this CSV list into Chirp

Upload to the radio

If you get error message that Chirp cant convert floating point in the tone settings, make sure to format EVERYTHING in your Excel sheet as GENERAL (not text, not number)

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